Identify the major product formed from the following reaction sequence:

What happens when
$(i)$ $n$-butyl chloride is treated with alcoholic $KOH$.
$(ii)$ bromobenzene is treated with $Mg$ in the presence of dry ether.
$(iii)$ chlorobenzene is subjected to hydrolysis.
$(iv)$ ethyl chloride is treated with aqueous $KOH$.
$(v)$ methyl bromide is treated with sodium in the presence of dry ether.
$(vi)$ methyl chloride is treated with $KCN$?

The compound which is $NOT$ formed when a mixture of $n$-butyl bromide and ethyl bromide is treated with sodium metal in the presence of dry ether is:

Reaction of $o$-toluic acid with $Br_2/Fe$ gives:

The major product for the following reaction is:

Identify the products formed and comment on the optical activity of the products for the following reaction: $3$-phenylcyclopent-$2$-en-$1$-one + $H_2$ $(2-3 \ atm)$ $\xrightarrow{10\% Pd/C, \text{Ethanol}}$ ?